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The patent EP3177659 was granted to Evonik Degussa on Feb 19, 2025. The application was filed on Jul 23, 2015 under application number EP15739623A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| HUNTSMAN | Sep 8, 2021 | WEIDNER STERN JESCHKE | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102004001408 |
| DESCRIPTION | DE102007046860 |
| DESCRIPTION | DE2439278 |
| DESCRIPTION | DE2533074 |
| DESCRIPTION | DE4229402 |
| DESCRIPTION | DE4239054 |
| DESCRIPTION | DE701825 |
| DESCRIPTION | EP0380993 |
| DESCRIPTION | EP0493836 |
| DESCRIPTION | EP0533202 |
| DESCRIPTION | EP0656382 |
| DESCRIPTION | EP0780414 |
| DESCRIPTION | EP0839852 |
| DESCRIPTION | EP0867465 |
| DESCRIPTION | EP0872505 |
| DESCRIPTION | EP1161474 |
| DESCRIPTION | EP1520870 |
| DESCRIPTION | EP1537159 |
| DESCRIPTION | EP1544235 |
| DESCRIPTION | EP1678232 |
| DESCRIPTION | EP1712578 |
| DESCRIPTION | EP1977825 |
| DESCRIPTION | EP1985642 |
| DESCRIPTION | EP1985644 |
| DESCRIPTION | EP2042534 |
| DESCRIPTION | EP2104696 |
| DESCRIPTION | SU1421738 |
| DESCRIPTION | US2002103091 |
| DESCRIPTION | US2006229375 |
| DESCRIPTION | US2006293400 |
| DESCRIPTION | US2007072951 |
| DESCRIPTION | US2007238800 |
| DESCRIPTION | US2007282026 |
| DESCRIPTION | US2008234402 |
| DESCRIPTION | US2834748 |
| DESCRIPTION | US2917480 |
| DESCRIPTION | US3346557 |
| DESCRIPTION | US3629308 |
| DESCRIPTION | US3900424 |
| DESCRIPTION | US3933695 |
| DESCRIPTION | US3953383 |
| DESCRIPTION | US4147847 |
| DESCRIPTION | US4500704 |
| DESCRIPTION | US4855379 |
| DESCRIPTION | US6359022 |
| DESCRIPTION | US6762274 |
| DESCRIPTION | US6924321 |
| DESCRIPTION | WO0058383 |
| DESCRIPTION | WO0158976 |
| DESCRIPTION | WO0222702 |
| DESCRIPTION | WO03029320 |
| DESCRIPTION | WO2004020497 |
| DESCRIPTION | WO2004060956 |
| DESCRIPTION | WO2004096882 |
| DESCRIPTION | WO2005033167 |
| DESCRIPTION | WO2005063841 |
| DESCRIPTION | WO2005085310 |
| DESCRIPTION | WO2005118668 |
| DESCRIPTION | WO2006055396 |
| DESCRIPTION | WO2006094227 |
| DESCRIPTION | WO2006116456 |
| DESCRIPTION | WO2007111828 |
| DESCRIPTION | WO2008058913 |
| DESCRIPTION | WO2009058367 |
| DESCRIPTION | WO2009130470 |
| DESCRIPTION | WO2010028362 |
| DESCRIPTION | WO2011163133 |
| DESCRIPTION | WO2012072441 |
| DESCRIPTION | WO2013022932 |
| DESCRIPTION | WO2013102053 |
| DESCRIPTION | WO9612759 |
| INTERNATIONAL-SEARCH-REPORT | CN102503909 |
| INTERNATIONAL-SEARCH-REPORT | EP0054219 |
| INTERNATIONAL-SEARCH-REPORT | EP0495249 |
| INTERNATIONAL-SEARCH-REPORT | WO2013019462 |
| OPPOSITION | GB896437 |
| OPPOSITION | US4450246 |
| OPPOSITION | WO2015200408 |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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Description
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Means of redress
OPPO
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Nov 12, 2020
Decision to grant a European patent
Search/Exam
Oct 29, 2020
(Electronic) Receipt
Search/Exam
Oct 29, 2020
English translation of the claims
Search/Exam
Oct 29, 2020
Filing of the translations of the claims
Search/Exam
Oct 29, 2020
French translation of claims
Search/Exam
Oct 29, 2020
Letter accompanying subsequently filed items
Search/Exam
Jul 27, 2020
Jul 27, 2020
Jul 27, 2020
Intention to grant (signatures)
Search/Exam
Jul 27, 2020
Text intended for grant (clean copy)
Search/Exam
Jul 27, 2020
Jan 23, 2020
(Electronic) Receipt
Search/Exam
Jan 23, 2020
Amended description with annotations
Search/Exam
Jan 23, 2020
Claims
Search/Exam
Jan 23, 2020
Description
Search/Exam
Jan 23, 2020
Letter accompanying subsequently filed items
Search/Exam
Jan 23, 2020
Nov 26, 2019
Annex to the communication
Search/Exam
Nov 26, 2019
Communication from the Examining Division
Search/Exam
Nov 12, 2019
Nov 6, 2019
Nov 6, 2019
Apr 30, 2019
Examination started
Search/Exam
Apr 15, 2019
Apr 9, 2019
(Electronic) Receipt
Search/Exam
Apr 9, 2019
Authorisation
Search/Exam
Apr 9, 2019
Letter accompanying subsequently filed items
Search/Exam
Apr 9, 2019
Jan 4, 2019
Aug 20, 2018
Aug 14, 2018
Observations by third parties
Search/Exam
Sep 7, 2017
(Electronic) Receipt
Search/Exam
Sep 7, 2017
Sep 7, 2017
Amendments received before examination
Search/Exam
Sep 7, 2017
Letter accompanying subsequently filed items
Search/Exam
May 17, 2017
Mar 14, 2017
Mar 10, 2017
Communication to designated inventor
Search/Exam
Mar 10, 2017
Communication to designated inventor
Search/Exam
Mar 10, 2017
Communication to designated inventor
Search/Exam
Mar 10, 2017
Communication to designated inventor
Search/Exam
Mar 10, 2017
Communication to designated inventor
Search/Exam
Feb 23, 2017
Jan 10, 2017
(Electronic) Receipt
Search/Exam
Jan 10, 2017
Priority search results
Search/Exam
Jan 10, 2017
Request for entry into the European phase
Search/Exam
Dec 16, 2016
Information on entry into European phase
Search/Exam
Mar 1, 2016
Feb 11, 2016
Copy of the international search report
Search/Exam
Feb 11, 2016
Copy of the international search report
Search/Exam
Feb 11, 2016
Published international application - A1
Search/Exam
Jan 12, 2016
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Oct 20, 2015
Jul 23, 2015
(Electronic) Receipt
PCTRO
Jul 23, 2015
Abstract
PCTRO
Jul 23, 2015
Claims
PCTRO
Jul 23, 2015
Description
PCTRO